Re: [PATCH] net: tls: enable __GFP_ZERO upon tls_init()

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On Fri, Jun 30, 2023 at 12:02 PM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
>
> On Fri, 30 Jun 2023 at 11:53, Tetsuo Handa
> <penguin-kernel@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > On 2023/06/30 18:36, Ard Biesheuvel wrote:
> > > Why are you sending this now?
> >
> > Just because this is currently top crasher and I can reproduce locally.
> >
> > > Do you have a reproducer for this issue?
> >
> > Yes. https://syzkaller.appspot.com/text?tag=ReproC&x=12931621900000 works.
> >
>
> Could you please share your kernel config and the resulting kernel log
> when running the reproducer? I'll try to reproduce locally as well,
> and see if I can figure out what is going on in the crypto layer

The config together with the repro is available at
https://syzkaller.appspot.com/bug?extid=828dfc12440b4f6f305d, see the
latest row of the "Crashes" table that contains a C repro.
Config: https://syzkaller.appspot.com/text?tag=KernelConfig&x=ee5f7a0b2e48ed66
Report: https://syzkaller.appspot.com/text?tag=CrashReport&x=1325260d900000
Syz repro: https://syzkaller.appspot.com/text?tag=ReproSyz&x=11af973e900000
C repro: https://syzkaller.appspot.com/text?tag=ReproC&x=163a1e45900000

The bug is reproducible for me locally as well (and Tetsuo's patch
makes it disappear, although I have no opinion on its correctness).




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